HardLabs

Chirp v2.4

Miceuz·PlantWateringAlarm

Chirp v2.4 PCB layout, top view — open source AVR/Arduino board by Miceuz

About the Chirp v2.4 PCB

Chirp v2.4 is an open source AVR/Arduino PCB design by Miceuz, published on GitHub. It is a board measuring 140.8 × 16 mm, with 19 components from 13 distinct parts.

Its main chip is the ATTINY44A, from the AVR/Arduino family. By type, the board carries 6 resistors, 4 capacitors, 2 diodes, 1 IC, 1 transistor and 1 jumper.

It belongs with the sensors designs in this gallery.

From the project

A soil humidity level sensor based on ATTINY44. Uses capacitive sensing.

A soil moisture level sensor based on ATTINY44. Uses capacitive sensing.

More info at http://wemakethings.net/chirp

Main components on the Chirp v2.4

ATTINY44A

Chirp v2.4 bill of materials (BOM)

19 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATTINY44A
TINY24/44/84-SSU
Atmel
IC1
1
BSN20
NXP
Q1
1
BATTERY
B1
1
AVR_SPI_PRG_6NS
JP1
1
SPEAKER/PS12
SP1
1
SPST_TACTFSMJSMA
SW1
1
LED
KINGBRIGHT
LED1
1
DIODE
SYC
D1
1
BAT54
DIODE-SCHOTTKY_
FAIRCHILD SEMICONDUCTOR
D2
4
1UF
1uF
MULTICOMP
C2, C3, C4, C5
4
10K
R1, R5, R6, R7
1
510K
MULTICOMP
R2
1
100R
R3

Chirp v2.4 design files

The KiCad project lives in the Miceuz/PlantWateringAlarm repository on GitHub; these links point at the commit this page was built from.

Chirp v2.4: common questions

What microcontroller does the Chirp v2.4 use?

The Chirp v2.4 is built around the ATTINY44A, from the AVR/Arduino family.

How big is the Chirp v2.4 PCB?

The Chirp v2.4 measures 140.8 × 16 mm and is 1.6 mm thick.

How many components are on the Chirp v2.4?

19 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Chirp v2.4 design files?

From the Miceuz/PlantWateringAlarm repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Chirp v2.4 design in my own project?

The repository has no license, so all rights stay with Miceuz. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Chirp v2.4 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

More boards in PlantWateringAlarm

Similar boards